Hi there! It sounds like you're experiencing an issue with copying and pasting URLs in Firefox, and they end up as about:blank. This might be caused by a browser extension or add-on interfering with the copy-paste functionality. To troubleshoot, try disabling any installed extensions temporarily and see if the problem persists. You can also try opening Firefox in Safe Mode, which disables all extensions, to see if the issue still occurs. If the problem goes away, you can gradually re-enable your extensions to find the one causing the problem. Additionally, ensure that Firefox is up to date and consider clearing your browser cache and cookies. If the issue persists, you can also try creating a new Firefox profile to see if that resolves the problem. Hope this helps! Let me know if you need further assistance.